I think e I don't think non vengono mai usati da soli, ma vengono sempre seguiti da so, come nell'esempio, o da una proposizione come nel caso di I think/I don't think he went to the concert.
La Scala, which first opened its doors in 1778, is one of the world's most famous venues for opera and ballet. It was completely refurbished in 2004, and its productions feature many of the greatest opera singers, ballet dancers, musicians, and conductors in the world.